/*
    KMC Simulation
    Copyright (c) 2012 Filip Rozbořil

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "Stopwatch.h"

void Stopwatch :: start()
{
	startTime = time(nullptr);
 	startClock = clock();
}

void Stopwatch :: mark()
{
	endTime = time(nullptr);
 	endClock = clock();
}

void Stopwatch :: reset()
{
	startTime = 0;
 	startClock = 0;
 	endTime = 0;
 	endClock = 0;
}

double Stopwatch :: getSeconds()
{
	double seconds = endTime - startTime;
   	
	if(seconds < numeric_limits<clock_t>::max()/CLOCKS_PER_SEC) //to prevent overflow
	{
		seconds = (endClock - startClock)/(double)CLOCKS_PER_SEC;	
	}
	
	return seconds;
}

string Stopwatch :: getElapsed()
{
	return getElapsed(getSeconds());
}

string Stopwatch :: getElapsed(double seconds)
{
	int hours, minutes;
   	
	hours = (int) seconds/3600;
 	seconds -= hours * 3600;
	minutes = (int) seconds/60;
	seconds -= minutes * 60;
	
	stringstream ss;

	ss << fixed << setfill('0')
		<< setw(2) << hours 
		<< ":" << setw(2) << minutes 
		<< ":" << setw(6) << setprecision(3) << seconds;
			
	return ss.str();
}
